Chapter 19. Interaction Diagrams

Sequence diagrams and communication diagrams—which are collectively called interaction diagrams—are two of the diagrams used in the UML for modeling the dynamic aspects of systems. An interaction diagram shows an interaction, consisting of a set of objects and their relationships, including the messages that may be dispatched among them. A sequence diagram is an interaction diagram that emphasizes the time ordering of messages; a communication diagram is an interaction diagram that emphasizes the structural organization of the objects that send and receive messages.

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